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Effects of the Use of a Combination of Two Bacillus Species on Performance, Egg Quality, Small Intestinal Mucosal Morphology, and Cecal Microbiota Profile in Aging Laying Hens.
- Source :
-
Probiotics and antimicrobial proteins [Probiotics Antimicrob Proteins] 2020 Mar; Vol. 12 (1), pp. 204-213. - Publication Year :
- 2020
-
Abstract
- Sixty-week-old Hy-Line brown laying hens were randomly divided into five groups and fed different diets over a period of 84 days. Experimental treatments included a basal diet (control); the basal diet supplemented with 1.0 × 10 <superscript>6</superscript> B. licheniformis yb-214245; the basal diet supplemented with 1.0 × 10 <superscript>6</superscript> B. subtilis yb-114246; a combination of both strains in a 2:1 ratio (6.6 × 10 <superscript>5</superscript> :3.3 × 10 <superscript>5</superscript> B. licheniformis yb-214245:B. subtilis yb-114246); and the latter, added with 5 mg/kg flavomycin. Basal diet supplementation with the combined Bacillus species improved egg-laying performance in aging hens significantly (P < 0.05). Eggshell strength improved significantly with this treatment, compared to the control or the antibiotic-supplemented groups (P < 0.05). The levels of total cholesterol, triglycerides, and very low-density lipoprotein cholesterol in egg yolk declined significantly more in the Bacillus-treated group than in the control or the antibiotic-supplemented groups (P < 0.01). Small intestinal morphology was better in the hens treated with the Bacillus combination than in the hens in the control group (P < 0.05). The total number of aerobic bacteria (Bacillus, Lactobacillus, and Bifidobacterium) in the cecum was significantly higher in all the Bacillus-supplemented hens than either in the control or the antibiotic-supplemented hens (P < 0.01); additionally, the number of E. coli and Salmonella was significantly lower than in the control group (P < 0.01). In conclusion, diet supplementation with the combination of Bacillus species used here for aging laying hens improved their growth performance, cecal bacterial composition, egg quality, and small intestine morphology.
- Subjects :
- Animal Husbandry
Animal Nutritional Physiological Phenomena
Animals
Cecum microbiology
Female
Gastrointestinal Microbiome
Intestinal Mucosa anatomy & histology
Intestine, Small anatomy & histology
Aging
Bacillus
Chickens metabolism
Chickens microbiology
Eggs analysis
Oviparity
Probiotics administration & dosage
Subjects
Details
- Language :
- English
- ISSN :
- 1867-1314
- Volume :
- 12
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Probiotics and antimicrobial proteins
- Publication Type :
- Academic Journal
- Accession number :
- 30810908
- Full Text :
- https://doi.org/10.1007/s12602-019-09532-x